CSA S349:20

Certification requirements for manufacturers of metal-plate-connected wood trusses

Legal Notice for Standards

Canadian Standards Association (operating as “CSA Group”) develops standards through a consensus standards development process approved by the Standards Council of Canada. This process brings together volunteers representing varied viewpoints and interests to achieve consensus and develop a standard. Although CSA Group administers the process and establishes rules to promote fairness in achieving consensus, it does not independently test, evaluate, or verify the content of standards.

Disclaimer and exclusion of liability

This document is provided without any representations, warranties, or conditions of any kind, express or implied, including, without limitation, implied warranties or conditions concerning this document’s fitness for a particular purpose or use, its merchantability, or its non-infringement of any third party’s intellectual property rights. CSA Group does not warrant the accuracy, completeness, or currency of any of the information published in this document. CSA Group makes no representations or warranties regarding this document’s compliance with any applicable statute, rule, or regulation.

IN NO EVENT SHALL CSA GROUP, ITS VOLUNTEERS, MEMBERS, SUBSIDIARIES, OR AFFILIATED COMPANIES, OR THEIR EMPLOYEES, DIRECTORS, OR OFFICERS, BE LIABLE FOR ANY DIRECT, INDIRECT, OR INCIDENTAL DAMAGES, INJURY, LOSS, COSTS, OR EXPENSES, HOWSOEVER CAUSED, INCLUDING BUT NOT LIMITED TO SPECIAL OR CONSEQUENTIAL DAMAGES, LOST REVENUE, BUSINESS INTERRUPTION, LOST OR DAMAGED DATA, OR ANY OTHER COMMERCIAL OR ECONOMIC LOSS, WHETHER BASED IN CONTRACT, TORT (INCLUDING NEGLIGENCE), OR ANY OTHER THEORY OF LIABILITY, ARISING OUT OF OR RESULTING FROM ACCESS TO OR POSSESSION OR USE OF THIS DOCUMENT, EVEN IF CSA GROUP HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES, INJURY, LOSS, COSTS, OR EXPENSES.

In publishing and making this document available, CSA Group is not undertaking to render professional or other services for or on behalf of any person or entity or to perform any duty owed by any person or entity to another person or entity. The information in this document is directed to those who have the appropriate degree of experience to use and apply its contents, and CSA Group accepts no responsibility whatsoever arising in any way from any and all use of or reliance on the information contained in this document.

CSA Group is a private not-for-profit company that publishes voluntary standards and related documents. CSA Group has no power, nor does it undertake, to enforce compliance with the contents of the standards or other documents it publishes.

Intellectual property rights and ownership

As between CSA Group and the users of this document (whether it be in printed or electronic form), CSA Group is the owner, or the authorized licensee, of all works contained herein that are protected by copyright, all trade-marks (except as otherwise noted to the contrary), and all inventions and trade secrets that may be contained in this document, whether or not such inventions and trade secrets are protected by patents and applications for patents. Without limitation, the unauthorized use, modification, copying, or disclosure of this document may violate laws that protect CSA Group’s and/or others’ intellectual property and may give rise to a right in CSA Group and/or others to seek legal redress for such use, modification, copying, or disclosure. To the extent permitted by licence or by law, CSA Group reserves all intellectual property rights in this document.

Patent rights

Attention is drawn to the possibility that some of the elements of this standard may be the subject of patent rights. CSA Group shall not be held responsible for identifying any or all such patent rights. Users of this standard are expressly advised that determination of the validity of any such patent rights is entirely their own responsibility.

Authorized use of this document

This document is being provided by CSA Group for informational and non-commercial use only. The user of this document is authorized to do only the following:

If this document is in electronic form:

• load this document onto a computer for the sole purpose of reviewing it;

• search and browse this document; and

• print this document if it is in PDF format.

  Limited copies of this document in print or paper form may be distributed only to persons who are authorized by CSA Group to have such copies, and only if this Legal Notice appears on each such copy.

  In addition, users may not and may not permit others to

• alter this document in any way or remove this Legal Notice from the attached standard;

• sell this document without authorization from CSA Group; or

• make an electronic copy of this document.

  If you do not agree with any of the terms and conditions contained in this Legal Notice, you may not load or use this document or make any copies of the contents hereof, and if you do make such copies, you are required to destroy them immediately. Use of this document constitutes your acceptance of the terms and conditions of this Legal Notice.

  
  

  
  

  Standards Update Service

  CSA S349:20

  August 2020

  
  

  Title: Certification requirements for manufacturers of metal-plate-connected wood trusses

  To register for e-mail notification about any updates to this publication

• go to store.csagroup.org

• click on Product Updates

The List ID that you will need to register for updates to this publication is 2428276.

If you require assistance, please e-mail techsupport@csagroup.org or call 416-747-2233.

Visit CSA Group’s policy on privacy at www.csagroup.org/legal to find out how we protect your personal information.

CSA S349:20

Certification requirements for manufacturers of metal-plate- connected wood trusses

®A trademark of the Canadian Standards Association, operating as “CSA Group”

Published in August 2020 by CSA Group

A not-for-profit private sector organization

178 Rexdale Boulevard, Toronto, Ontario, Canada M9W 1R3

To purchase standards and related publications, visit our Online Store at store.csagroup.org

or call toll-free 1-800-463-6727 or 416-747-4044.

ICS 91.080.20

ISBN 978-1-4883-3017-9

© 2020 Canadian Standards Association

All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher.

CSA S349:20

Certification requirements for manufacturers of metal-plate-

connected wood trusses

Contents

Technical Committee on Engineering Design in Wood 3

Subcommittee on Design Principles 6

Working Group for Metal-Plate-Connected Wood Trusses 8

Preface 9

1. Scope 10

   
   

2. Reference publications 10

   
   

3. Definitions 11

   
   

4. Certification 11

   1. General 11

   2. Application 11

   3. Audit 11

   4. Withdrawal of certification and reinstatement 12

      
      

5. In-plant qualification program 12

   1. Plant quality assurance manual 12

   2. Manufacturing tolerances 12

   3. In-plant inspections 12

      
      

      5.3.1	Frequency and quantity of	internal in-plant inspections	12
      5.3.2	Non-conforming trusses	13
      5.4	Documentation 13

      
      

6. Truss design drawings 13

   1. Design procedures 13

   2. Minimum information on truss design drawings 13

      
      

7. Materials 13

   1. Lumber 13

      1. General 13

      2. Fingerjoined lumber stamped “DRY USE ONLY” 13

   2. Metal connector plates 13

      
      

8. Handling and storage 14

   1. Lumber and plates 14

   2. Handling of fingerjoined lumber 14

   3. Damage during fabrication 14

   4. Finished trusses 14

      
      

9. Truss submittal package 14

   
   

10. Repair and repressing 14

    
    

    August 2020 © 2020 Canadian Standards Association 1

    CSA S349:20

    Certification requirements for manufacturers of metal-plate-

    connected wood trusses

    
    

    1. Repair specifications 14

    2. Lumber condition due to plate removal 14

       1. Lumber with tooth holes 14

       2. Damaged lumber 14

    3. Repressing 14

       
       

11. Truss marking 15

    1. Plant certification marking 15

    2. Special marking 15

Annex A (informative) — Sample audit tool 16

August 2020 © 2020 Canadian Standards Association 2

CSA S349:20

Certification requirements for manufacturers of metal-plate-

connected wood trusses

Preface

This is the first edition of CSA S349, Certification requirements for manufacturers of metal-plate- connected wood trusses.

This Standard was prepared by the Working Group for Metal-Plate-Connected Wood Trusses, under the jurisdiction of the Subcommittee on Design Principles and the Technical Committee on Engineering Design in Wood, and the Strategic Steering Committee on Standards for Construction and Civil Infrastructure, and has been formally approved by the Technical Committee.

Notes:

1. Use of the singular does not exclude the plural (and vice versa) when the sense allows.

2. Although the intended primary application of this Standard is stated in its Scope, it is important to note that it remains the responsibility of the users of the Standard to judge its suitability for their particular purpose.

3. This Standard was developed by consensus, which is defined by CSA Policy governing standardization — Code of good practice for standardization as “substantial agreement. Consensus implies much more than a simple majority, but not necessarily unanimity”. It is consistent with this definition that a member may be included in the Technical Committee list and yet not be in full agreement with all clauses of this Standard.

4. To submit a request for interpretation of this Standard, please send the following information to inquiries@csagroup.org and include “Request for interpretation” in the subject line:

   1. define the problem, making reference to the specific clause, and, where appropriate, include an illustrative sketch;

   2. provide an explanation of circumstances surrounding the actual field condition; and

   3. where possible, phrase the request in such a way that a specific “yes” or “no” answer will address the issue.

      Committee interpretations are processed in accordance with the CSA Directives and guidelines governing standardization and are available on the Current Standards Activities page at standardsactivities.csa.ca.

5. This Standard is subject to review within five years from the date of publication. Suggestions for its improvement will be referred to the appropriate committee. To submit a proposal for change, please send the following information to inquiries@csagroup.org and include “Proposal for change” in the subject line:

   1. Standard designation (number);

   2. relevant clause, table, and/or figure number;

   3. wording of the proposed change; and

   4. rationale for the change.

August 2020 © 2020 Canadian Standards Association 9

CSA S349:20

Certification requirements for manufacturers of metal-plate-

connected wood trusses

CSA S349:20

Certification requirements for manufacturers of metal-plate-connected wood trusses

1. Scope

   
   

   1.1

   This Standard specifies the minimum certification requirements for facilities engaged in the manufacture of metal-plate-connected wood trusses designed in accordance with CSA O86 and TPIC in order to conform with industry standards.

   
   

   1.2

   In this Standard, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the Standard; “should” is used to express a recommendation or that which is advised but not required; and “may” is used to express an option or that which is permissible within the limits of the Standard.

   Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.

   
   

   Notes to tables and figures are considered part of the table or figure and may be written as requirements.

   
   

   Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.

   
   

   1.3

   The values given in SI units are the units of record for the purposes of this Standard. The values given in parentheses are for information and comparison only.

   
   

2. Reference publications

This Standard refers to the following publications, and where such reference is made, it shall be to the edition listed below.

CSA Group

O86:19

Engineering design in wood

Canadian Wood Truss Association (CWTA)

Truss Fabricator Guidelines on the Use of Fingerjoined Lumber in Metal Plate Connected Trusses (2012)

August 2020 © 2020 Canadian Standards Association 10